var detailview = $.extend({}, $.fn.datagrid.defaults.view, {
    render: function(target, container, frozen){
        var state = $.data(target, 'datagrid');
        var opts = state.options;
        if (frozen){
            if (!(opts.rownumbers || (opts.frozenColumns && opts.frozenColumns.length))){
                return;
            }
        }

        var rows = state.data.rows;
        var fields = $(target).datagrid('getColumnFields', frozen);
        var table = [];
        table.push('<table class="datagrid-btable" cellspacing="0" cellpadding="0" border="0"><tbody>');
        for(var i=0; i<rows.length; i++) {
            // get the class and style attributes for this row
            var css = opts.rowStyler ? opts.rowStyler.call(target, i, rows[i]) : '';
            var classValue = '';
            var styleValue = '';
            if (typeof css == 'string'){
                styleValue = css;
            } else if (css){
                classValue = css['class'] || '';
                styleValue = css['style'] || '';
            }

            var cls = 'class="datagrid-row ' + (i % 2 && opts.striped ? 'datagrid-row-alt ' : ' ') + classValue + '"';
            var style = styleValue ? 'style="' + styleValue + '"' : '';
            var rowId = state.rowIdPrefix + '-' + (frozen?1:2) + '-' + i;
            table.push('<tr id="' + rowId + '" datagrid-row-index="' + i + '" ' + cls + ' ' + style + '>');
            table.push(this.renderRow.call(this, target, fields, frozen, i, rows[i]));
            table.push('</tr>');

            table.push('<tr style="display:none;">');
            if (frozen){
                table.push('<td colspan=' + (fields.length+2) + ' style="border-right:0">');
            } else {
                table.push('<td colspan=' + (fields.length) + '>');
            }
            table.push('<div class="datagrid-row-detail">');
            if (frozen){
                table.push('&nbsp;');
            } else {
                table.push(opts.detailFormatter.call(target, i, rows[i]));
            }
            table.push('</div>');
            table.push('</td>');
            table.push('</tr>');

        }
        table.push('</tbody></table>');

        $(container).html(table.join(''));
    },

    renderRow: function(target, fields, frozen, rowIndex, rowData){
        var opts = $.data(target, 'datagrid').options;

        var cc = [];
        if (frozen && opts.rownumbers){
            var rownumber = rowIndex + 1;
            if (opts.pagination){
                rownumber += (opts.pageNumber-1)*opts.pageSize;
            }
            cc.push('<td class="datagrid-td-rownumber"><div class="datagrid-cell-rownumber">'+rownumber+'</div></td>');
        }
        for(var i=0; i<fields.length; i++){
            var field = fields[i];
            var col = $(target).datagrid('getColumnOption', field);
            if (col){
                var value = rowData[field];	// the field value
                var css = col.styler ? (col.styler(value, rowData, rowIndex)||'') : '';
                var classValue = '';
                var styleValue = '';
                if (typeof css == 'string'){
                    styleValue = css;
                } else if (cc){
                    classValue = css['class'] || '';
                    styleValue = css['style'] || '';
                }
                var cls = classValue ? 'class="' + classValue + '"' : '';
                var style = col.hidden ? 'style="display:none;' + styleValue + '"' : (styleValue ? 'style="' + styleValue + '"' : '');

                cc.push('<td field="' + field + '" ' + cls + ' ' + style + '>');

                if (col.checkbox){
                    style = '';
                } else if (col.expander){
                    style = "text-align:center;height:16px;";
                } else {
                    style = styleValue;
                    if (col.align){style += ';text-align:' + col.align + ';'}
                    if (!opts.nowrap){
                        style += ';white-space:normal;height:auto;';
                    } else if (opts.autoRowHeight){
                        style += ';height:auto;';
                    }
                }

                cc.push('<div style="' + style + '" ');
                if (col.checkbox){
                    cc.push('class="datagrid-cell-check ');
                } else {
                    cc.push('class="datagrid-cell ' + col.cellClass);
                }
                cc.push('">');

                if (col.checkbox){
                    cc.push('<input type="checkbox" name="' + field + '" value="' + (value!=undefined ? value : '') + '">');
                } else if (col.expander) {
                    //cc.push('<div style="text-align:center;width:16px;height:16px;">');
                    cc.push('<span class="datagrid-row-expander datagrid-row-expand" style="display:inline-block;width:16px;height:16px;cursor:pointer;" />');
                    //cc.push('</div>');
                } else if (col.formatter){
                    cc.push(col.formatter(value, rowData, rowIndex));
                } else {
                    cc.push(value);
                }

                cc.push('</div>');
                cc.push('</td>');
            }
        }
        return cc.join('');
    },

    insertRow: function(target, index, row){
        var opts = $.data(target, 'datagrid').options;
        var dc = $.data(target, 'datagrid').dc;
        var panel = $(target).datagrid('getPanel');
        var view1 = dc.view1;
        var view2 = dc.view2;

        var isAppend = false;
        var rowLength = $(target).datagrid('getRows').length;
        if (rowLength == 0){
            $(target).datagrid('loadData',{total:1,rows:[row]});
            return;
        }

        if (index == undefined || index == null || index >= rowLength) {
            index = rowLength;
            isAppend = true;
            this.canUpdateDetail = false;
        }

        $.fn.datagrid.defaults.view.insertRow.call(this, target, index, row);

        _insert(true);
        _insert(false);

        this.canUpdateDetail = true;

        function _insert(frozen){
            var v = frozen ? view1 : view2;
            var tr = v.find('tr[datagrid-row-index='+index+']');

            if (isAppend){
                var newDetail = tr.next().clone();
                tr.insertAfter(tr.next());
            } else {
                var newDetail = tr.next().next().clone();
            }
            newDetail.insertAfter(tr);
            newDetail.hide();
            if (!frozen){
                newDetail.find('div.datagrid-row-detail').html(opts.detailFormatter.call(target, index, row));
            }
        }
    },

    deleteRow: function(target, index){
        var opts = $.data(target, 'datagrid').options;
        var dc = $.data(target, 'datagrid').dc;
        var tr = opts.finder.getTr(target, index);
        tr.next().remove();
        $.fn.datagrid.defaults.view.deleteRow.call(this, target, index);
        dc.body2.triggerHandler('scroll');
    },

    updateRow: function(target, rowIndex, row){
        var dc = $.data(target, 'datagrid').dc;
        var opts = $.data(target, 'datagrid').options;
        var cls = $(target).datagrid('getExpander', rowIndex).attr('class');
        $.fn.datagrid.defaults.view.updateRow.call(this, target, rowIndex, row);
        $(target).datagrid('getExpander', rowIndex).attr('class',cls);

        // update the detail content
        if (this.canUpdateDetail){
            var row = $(target).datagrid('getRows')[rowIndex];
            var detail = $(target).datagrid('getRowDetail', rowIndex);
            detail.html(opts.detailFormatter.call(target, rowIndex, row));
        }
    },

    bindEvents: function(target){
        var state = $.data(target, 'datagrid');
        var dc = state.dc;
        var opts = state.options;
        var body = dc.body1.add(dc.body2);
        var clickHandler = ($.data(body[0],'events')||$._data(body[0],'events')).click[0].handler;
        body.unbind('click').bind('click', function(e){
            var tt = $(e.target);
            var tr = tt.closest('tr.datagrid-row');
            if (!tr.length){return}
            if (tt.hasClass('datagrid-row-expander')){
                var rowIndex = parseInt(tr.attr('datagrid-row-index'));
                if (tt.hasClass('datagrid-row-expand')){
                    $(target).datagrid('expandRow', rowIndex);
                } else {
                    $(target).datagrid('collapseRow', rowIndex);
                }
                $(target).datagrid('fixRowHeight');

            } else {
                clickHandler(e);
            }
            e.stopPropagation();
        });
    },

    onBeforeRender: function(target){
        var state = $.data(target, 'datagrid');
        var opts = state.options;
        var dc = state.dc;
        var t = $(target);
        var hasExpander = false;
        var fields = t.datagrid('getColumnFields',true).concat(t.datagrid('getColumnFields'));
        for(var i=0; i<fields.length; i++){
            var col = t.datagrid('getColumnOption', fields[i]);
            if (col.expander){
                hasExpander = true;
                break;
            }
        }
        if (!hasExpander){
            if (opts.frozenColumns && opts.frozenColumns.length){
                opts.frozenColumns[0].splice(0,0,{field:'_expander',expander:true,width:24,resizable:false,fixed:true});
            } else {
                opts.frozenColumns = [[{field:'_expander',expander:true,width:24,resizable:false,fixed:true}]];
            }

            var t = dc.view1.children('div.datagrid-header').find('table');
            var td = $('<td rowspan="'+opts.frozenColumns.length+'"><div class="datagrid-header-expander" style="width:24px;"></div></td>');
            if ($('tr',t).length == 0){
                td.wrap('<tr></tr>').parent().appendTo($('tbody',t));
            } else if (opts.rownumbers){
                td.insertAfter(t.find('td:has(div.datagrid-header-rownumber)'));
            } else {
                td.prependTo(t.find('tr:first'));
            }
        }

        var that = this;
        setTimeout(function(){
            that.bindEvents(target);
        },0);
    },

    onAfterRender: function(target){
        var that = this;
        var state = $.data(target, 'datagrid');
        var dc = state.dc;
        var opts = state.options;
        var panel = $(target).datagrid('getPanel');

        $.fn.datagrid.defaults.view.onAfterRender.call(this, target);

        if (!state.onResizeColumn){
            state.onResizeColumn = opts.onResizeColumn;
        }
        if (!state.onResize){
            state.onResize = opts.onResize;
        }
        function setBodyTableWidth(){
            var columnWidths = dc.view2.children('div.datagrid-header').find('table').width();
            dc.body2.children('table').width(columnWidths);
        }

        opts.onResizeColumn = function(field, width){
            setBodyTableWidth();
            var rowCount = $(target).datagrid('getRows').length;
            for(var i=0; i<rowCount; i++){
                $(target).datagrid('fixDetailRowHeight', i);
            }

            // call the old event code
            state.onResizeColumn.call(target, field, width);
        };
        opts.onResize = function(width, height){
            setBodyTableWidth();
            state.onResize.call(panel, width, height);
        };

        this.canUpdateDetail = true;	// define if to update the detail content when 'updateRow' method is called;

        dc.footer1.find('span.datagrid-row-expander').css('visibility', 'hidden');
        $(target).datagrid('resize');
    }
});

$.extend($.fn.datagrid.methods, {
    fixDetailRowHeight: function(jq, index){
        return jq.each(function(){
            var opts = $.data(this, 'datagrid').options;
            if (!(opts.rownumbers || (opts.frozenColumns && opts.frozenColumns.length))){
                return;
            }
            var dc = $.data(this, 'datagrid').dc;
            var tr1 = opts.finder.getTr(this, index, 'body', 1).next();
            var tr2 = opts.finder.getTr(this, index, 'body', 2).next();
            // fix the detail row height
            if (tr2.is(':visible')){
                tr1.css('height', '');
                tr2.css('height', '');
                var height = Math.max(tr1.height(), tr2.height());
                tr1.css('height', height);
                tr2.css('height', height);
            }
            dc.body2.triggerHandler('scroll');
        });
    },
    getExpander: function(jq, index){	// get row expander object
        var opts = $.data(jq[0], 'datagrid').options;
        return opts.finder.getTr(jq[0], index).find('span.datagrid-row-expander');
    },
    // get row detail container
    getRowDetail: function(jq, index){
        var opts = $.data(jq[0], 'datagrid').options;
        var tr = opts.finder.getTr(jq[0], index, 'body', 2);
        return tr.next().find('div.datagrid-row-detail');
    },
    expandRow: function(jq, index){
        return jq.each(function(){
            var opts = $(this).datagrid('options');
            var dc = $.data(this, 'datagrid').dc;
            var expander = $(this).datagrid('getExpander', index);
            if (expander.hasClass('datagrid-row-expand')){
                expander.removeClass('datagrid-row-expand').addClass('datagrid-row-collapse');
                var tr1 = opts.finder.getTr(this, index, 'body', 1).next();
                var tr2 = opts.finder.getTr(this, index, 'body', 2).next();
                tr1.show();
                tr2.show();
                $(this).datagrid('fixDetailRowHeight', index);
                if (opts.onExpandRow){
                    var row = $(this).datagrid('getRows')[index];
                    opts.onExpandRow.call(this, index, row);
                }
            }
        });
    },
    collapseRow: function(jq, index){
        return jq.each(function(){
            var opts = $(this).datagrid('options');
            var dc = $.data(this, 'datagrid').dc;
            var expander = $(this).datagrid('getExpander', index);
            if (expander.hasClass('datagrid-row-collapse')){
                expander.removeClass('datagrid-row-collapse').addClass('datagrid-row-expand');
                var tr1 = opts.finder.getTr(this, index, 'body', 1).next();
                var tr2 = opts.finder.getTr(this, index, 'body', 2).next();
                tr1.hide();
                tr2.hide();
                dc.body2.triggerHandler('scroll');
                if (opts.onCollapseRow){
                    var row = $(this).datagrid('getRows')[index];
                    opts.onCollapseRow.call(this, index, row);
                }
            }
        });
    }
});
